-8х² +5х+4=0 / * -1
8х² - 5х - 4=0
D = b² - 4ac
D = 25 - 4 * 8 * (-4)
D = 153
=
x =
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-8х² +5х+4=0 / * -1
8х² - 5х - 4=0
D = b² - 4ac
D = 25 - 4 * 8 * (-4)
D = 153
=
x =
x =